简介:Weinvestigatetheelasticfieldinducedbyanedgedislocationinamultilayeredlaminatedcompositecomposedof(N—2)thinbondedelasticlayerssandwichedbetweentwosemi-infiniteelasticmedia.Asimpleclosed-formsolutionisobtainedwhenallthephaseshaveequalshearmodulusbutdifferentPoisson'sratios,andwhenthedislocationislocatedintheuppersemi-infinitephase.Theimageforceactingonthedislocationduetoitsinteractionwiththemultilayeredstructureisalsoderived.Severalspec...
简介:Theadsorptionisothermsofcaffeinefromaqueoussolutionontothreehydrogendonatingadsorbents-hydroxypolystyrene,polystryene-azo-pyrogallol,andD72resin-weremeasured.TheadsorptionenthalpiescalculatedfromtheisothermsaccordingtotheClausisu-Clapeyronequationwere-24-36kJ/mol,-32-37kJ/mol,and-19-24kJ/molrespectively.Thesevaluesimpliedthattheadsorptionprocesseswerebasedonhydrogenbonding.Furthermore.themechanismoftheadsorptionofcaffeineontoD72resinwasstudiedbyIRspectraandthesmallmolecularmodelexperiments,andtheresultsshowedthattheadsorptionofcaffeineontohydrogendonatingadsorbentswasbasedonhydrogenbonding.
简介:ThehydrogenstoragepropertiesofTi1.2Fe+xCa(x=1%,3%and5%inmassfraction)alloyswasinvestigated.ResultsshowthatthemodifiedalloyscanbeactivatedwithoutanythermaltreatmentatroomtemperatureduetotheadditionofCaandexcessTiinthealloys.HydrogenstoragepropertiesofthesemodifiedalloysvarywithCaamountandreactiontemperature.Inaddition,theinfluencemechanismoftheadditionofCaandexcessiveTiontheactivationbehaviorandhydrogenstoragecapacityofthealloyswasdiscussed.
简介:HydrogenabsorptionsofLaFe11.5Si1.5compoundin1-atmhydrogengasatdifferenttemperaturesareinvestigated.Thehydrogencontentinthehydrogenatedsampledoesnotincreasewiththeincreaseoftemperatureofhydrogenabsorptionbutchangescomplicatedly.Thecharacteristicoffirst-ordertransitioninLaFe11.5Si1.5compoundisweakenedafterhydrogenabsorption.Itleadsthepeaksofmagneticentropytobecomewiderandthehysteresislosstoreducesignificantly,butrelativecoolingpower(RCP)isnotchangedconsiderably.
简介:AZener-Strohcrackinteractingwithanedgedislocationisstudied.Thecrackfacesareassumedtobetractionfree.Theapplied'generalizedloading'forcrackistheinitialdisplacementjumpandtheinterventionoftheedgedislocation.Throughdecomposingtheproblemintotwosubsimpleproblems,usingthesuperpositionprinciple,itssolutionisobtained.Todemonstrateboththevalidityofthesolutionanditspotentialapplication,twosimpleexamplesrelatedtothecrackstressintensityfactorsarepre...
简介:Inthispaper,theelasticfieldoftheinfinitehomogeneousmediumwithtwocircularcylindricalinclusionsundertheactionofascrewdislocationisin-vestigatedandthecorrespondinganalyticalsolutionisobtained.Here,theconformalmappingandthetheoremofanalyticalcontinuationareused.Fromtheresultsob-tained,itcanbeseenthattheelasticfielddependsontheshearmoduliofindividualphases,thegeometricparametersofthesystem,andthepositionandrelativeslipofthescrewdislocation.Inaddition,thecorrespondingspecificcasesarealsoconsid-eredinthispaperwhentwocircularcylindricalinclusionsaretangenttoeachotherandtheyareholesand/orrigidinclusions.Finally,numericalresultsareillustratedtoshowtheinteractionbetweenthescrewdislocationandtwocircularcylindricalinclusions.
简介:为高coercivityNdDyFeCoNbCuBsintered体积磁铁的氢吸收和解吸附作用特征被学习,由微分扫描热量测定(DSC)测量和加氢动力学测量。DSC大小证明Nd富有的阶段的加氢发生在40185戠瑵眠瑩?畦瑲敨?湩牣慥敳漠?慌挠湯整瑮?桴?慭潪?桰獡?景琠敨愠?慣瑳愠汬祯?档湡敧?的温度范围湩潴?乡????瀠慨敳?桔牥慭?瑳'L汩瑩?景琠敨愠?灳湵愠汬祯?慷?瑳摵敩?祢搠晩敦敲瑮慩?諟熻鷸{挠污牯浩瑥祲?卄??桳睯湩?桴瑡猠楰湮湩?慲整眠獡愠渠来楬楧汢?慦瑣牯漠?桴?牣獹慴汬穩瑡潩?整灭牥瑡牵?景琠敨愠潭灲潨獵瀠慨敳?桔?票牤杯湥愠獢牯瑰潩?湡?敤潳灲楴湯欠湩瑥捩?景琠敨愠?慣瑳愠摮愠?灳湵愠汬祯?敷敲洠慥?敲?獵湩?湡愠瑵浯瑡捩污祬挠湯牴汯敬摥琠敨猠牵慦散漠?污浵湩浵愠汬祯挠浯汰瑥汥?楷桴湩猠潨瑲瀠潨灳慨楴杮琠浩?
简介:原则,设计,构造和表演安培计并且为通过金属设备的墙测量氢的浸透率的potentiometric传感器被调查以便与高精确性开发氢传感器的一种新类型。在一个给定的收费条件下面的氢浸透的短暂曲线被采用评估氢传感器的二种类型的表演。在一样的条件下面与传感器的二种类型检测的氢集中的相对偏差从3.0%~13%变化了。精确性,反应时间,重制度,和安装被讨论并且比较。potentiometric传感器(电子传感器)的反应时间比安培计的传感器(我传感器)的短。传感器的两种类型展出了好重制度。由包含高电的电导率和强壮的粘附的二功能的一种质子导体粘合剂或非液体电解质组成的我传感器的开发将是有希望的前景以便在高温度测量氢浸透。
简介:Ultrasonicattenuationinliquidhydrogenhasbeenmessuredwiththepulse-echotechniqueasafunctionoftemperaturefrom13.84Kto20.50K,at45MHz.Theresultsindicatethatthetemperaturedependenceofultrasonicattenuationinliquidhydrogenismainlydeterminedbyvolumeviscosityeffect.Ultrasonicattenuatinduetovolumeviscosityisgettingmoreandmorewithcooling.Theratiobetweenvolumeviscouscoefficientandshearviscouscoefficientisfrom1.4to4.2withinthemeasuredtempera-tureregion.
简介:客观:设计一个临床上适用的transoralpharyngealatlantoaxialreduction盘子(TARP),介绍操作过程,并且评估它的初步的临床的效果。方法:一个新奇TARP系统,包括的蝴蝶钛合金板,self-lockingscrews,atlantoaxial减速器和另外的运作的仪器被开发。这个系统与先天或创伤的起源的无法缩减的atlantoaxial脱臼在五个病人上临床上被使用。在操作期间,减小被板和atlantoaxial减速器的联合行动在transoral关节版本和绳索解压缩以后完成。骨头接枝小粒在双边的atlantoaxial关节之间被植入,TARP被用来随后使地图集和轴不能调动。结果:临床的申请证明TARP能导致立刻的减小并且方法是操作上可行的并且它的帖子运作的效果令人满意。结论:TARP的设计是新奇的。运作的过程简单、易用。而且,立刻的减小能在操作期间被完成,固定是相对稳定的。TARP是为无法缩减的atlantoaxial脱臼的一种理想的选择并且可以为进一步临床的应用程序有优秀前景。
简介:作者报导了支撑了臀部的无法缩减的postero侧面的创伤的脱臼与的一个27岁的人的案例胶囊并且labral陷阱。起始的X光显示出仅仅小acetabular碎片。在在一般麻醉下面与肌肉麻痹减少臀部的二次尝试失败了以后,病人被立即的开的减小通过一条postero侧面的途径对待。臀部的外科的探索表明小osteochondral碎片属于上唇和囊的一大片,堵塞髋臼。大腿骨的头与扭扣孔效果在撕的囊上交叉。这些元素被减轻,骨头碎片与2公里螺丝钉被修理,囊被修理。在10年的后续,功能的结果与100个点的一个哈里斯分数和坏死或骨关节炎的没有迹象是优秀的。作者建议这不平常的损害的文学评论。
简介:Aplasticdeformationzonenearascrewdislocationistreatedasanequivalenttrans-formationinclusionbymeansoftheEshelbyinclusiontheory.Aclosed-formsolutionfordeter-miningtheinteractionbetweenascrewdislocationandaplasticallydeformedzoneofanarbitraryshapeisobtainedbyusingthesolutionbetweenadislocationandanequivalenttransformationinclusion.